Merge branch '220-petrack-crashes-on-cvtcolor' into 'master'

Resolve "PeTrack crashes on `cvtColor`"

Closes #220

See merge request !136

CMakeLists.txt

@@ -125,7 +125,7 @@ message("Building with Qt${QT_DEFAULT_MAJOR_VERSION} (${Qt5Core_VERSION_STRING})
 # OpenCV
 find_package(
         OpenCV 4.2.0 EXACT
-        COMPONENTS core calib3d aruco video videoio highgui
+        COMPONENTS core calib3d aruco video videoio highgui imgproc
         REQUIRED
 )
 message("Building with OpenCV${OpenCV_VERSION_MAJOR} (${OpenCV_VERSION})")